Function fromPredicate

repos/effect/packages/effect/src/internal/hashSet.ts:105–113

(self: HashSet<V>, predicate: (value: V) => boolean)

// Helper function for building new HashSets from iteration
const fromPredicate = <V>(self: HashSet<V>, predicate: (value: V) => boolean): HashSet<V> => {
  let result = HashMap.empty<V, boolean>()
  for (const value of self) {
    if (predicate(value)) {
      result = HashMap.set(result, value, true)
    }
  }
  return makeImpl(result)
}

/** @internal */
export const union = <V0, V1>(self: HashSet<V0>, that: HashSet<V1>): HashSet<V0 | V1> => {